Company Presentation

October 2010

Disclaimers & Safe Harbour Statement

This presentation does not constitute an offer to sell or issue or the solicitation of an offer to buy or acquire securities ofTrina Solar Limited (the “Company”) in any jurisdiction or an inducement to enter into investment activity, nor may it orany part of it form the basis of or be relied on in connection with any contract or commitment whatsoever.

The information herein has been prepared by the Company solely for use in this presentation. No representation,warranty or undertaking, express or implied, is made as to, and no reliance should be placed on, the fairness, accuracy,completeness or correctness of the information or the opinions contained herein. None of the Company or any of itsaffiliates, advisors or representatives will be liable (in negligence or otherwise) for any loss howsoever arising from anyuse of this presentation or its contents or otherwise arising in connection with the presentation.

This announcement contains forward-looking statements within the meaning of the safe harbor provisions of the PrivateSecurities Litigation Reform Act of 1995. All statements other than statements of historical fact in this announcement areforward-looking statements, including but not limited to, the Company's ability to raise additional capital to finance theCompany's activities; the effectiveness, profitability and marketability of its products; the future trading of the securitiesof the Company; the period of time for which the Company's current liquidity will enable the Company to fund itsoperations; general economic and business conditions; the volatility of the Company's operating results and financialcondition; and other risks detailed in the Company's filings with the Securities and Exchange Commission.

These forward-looking statements involve known and unknown risks and uncertainties and are based on currentexpectations, assumptions, estimates and projections about the Company and the industry in which the Companyoperates. The Company undertakes no obligation to update forward-looking statements to reflect subsequent occurringevents or circumstances, or to changes in its expectations, except as may be required by law. Although the Companybelieves that the expectations expressed in these forward looking statements are reasonable, it cannot assure you thatsuch expectations will turn out to be correct, and the Company cautions investors that actual results may differmaterially from the anticipated results.

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1. A Global Solar Player

2. World Class Manufacturing

3. Trina Solar Strategy

4. Market and Sales

1_Source: Navigant Consulting, Solar Outlook 01-20102_Source: Company releases

The Roadmap to Leadership – Module Shipments

20061 2007 1 20081 2009 2 2010 (est.)2

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Module Shipments, in MW

399

900-930

On track to be among the largest PV

module suppliers

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76

201

Top 20

435

180

363

309

498

458

1,112

704

Growing into an industry leaderwhile maintaining strong financials.

Growing into an industry leaderwhile maintaining strong financials.

Top 6

Top15

Top 10

Company Snapshot

● Founded in 1997, in Changzhou, China

● $845.1mm in Revenue in FY09

● >11,000 employees worldwide1

● Listed on the NYSE (under TSL ticker)

● One single manufacturing campus

Our Advantage: Vertically Integrated Business Model

Ingot Wafer Cell Module System

Over 1GW of modules shipped since 2006

1_As of August 20102_ Estimate provided in Trina Solar Q2 2010 Earnings Call

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Italy19-21%

Estimated shipments in 2010Estimated shipments in 201022

900-930 MW

Czech Rep.4-6%

Germany29-31%

Spain10-12%

Italy19-21%Belgium

7-9%

France4-6%

USA13-15%

China3-5%

ROW2-3%

Module Capacity Expansion

Module Shipments (MW) Main facts

170 – 290Wp170 – 290WpModule Power Range

Wafer Thickness

Cell Efficiency1

Polysilicon Usage

180 µm180 µm

Up to 19.5% monoUp to 18.0% multiUp to 19.5% monoUp to 18.0% multi

6.0g/W in 1Q106.0g/W in 1Q10

1_Test production line basis2_ Cell and Module Capacity by end of August 2010

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Module Capacity (MW)

2775

201

399

900-930

2006 2007 2008 2009 2010

Long-Term Expansion Plans

Integrated manufacturing capabilitiesallows better control of

cost quality yield product developmentþ þ þ þ cycle timeþ

Trina Photovoltaic Park Facility Site

n Strategic location of key suppliers

n Suppliers bring benefits like cost savings

East Campus (Phases 2 and 3) n 500+MW production facility

n Single manufacturing campus

n Increased degree of vertical integration and automation

Phase 1- Finished -

Trina PV Park Facility Site

Phase 2(Current)

Phase 3

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R&D and manufacturing cluster

n Cluster effect

n Sharing research/test lab capabilities

Top Management Team

Jifan GaoChairman and

Chief Executive Officer

Jifan GaoChairman and

Chief Executive Officer

n 20+ years of experience in finance and accounting

n Former Exec. VP of Finance of Spreadtrum (NASDAQ:SPRD)

n Former Controller at one of the world's largest NASDAQ-listed semiconductor

assembly and testing companies

Terry WangChief Financial Officer

Terry WangChief Financial Officer

n 20+ years of management and entrepreneurial experience

n Visionary founder of Trina Solar Ltd, in 1997

n Standing Vice Chairman of the New Energy Chamber of Commerce of the All-China

Federation of Industry and Commerce

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Stephanie ShaoChief Human Resource Officer

Stephanie ShaoChief Human Resource Officer

n Over 15 years of global experience in Fortune 500 Companies in managing key HR

functional areas and Marketing Management across industries and geographies

n Proven record in building people and organizational capabilities and business

partnership to support global business growth

n Ph.D in Social & Organizational Psychology from Rutgers University and Executive

Education in Marketing Management from Columbia Business School

1. A Global Solar Player

2. World Class Manufacturing

3. Trina Solar Strategy

4. Market and Sales

Our Competitive Advantage

The Best $/kWh Value

101_ TUV Reinland's Energy Yield 2008” (period from June 1 to September 30, 2008)2_ see slide 12 for more details

3_ Test production line basis

n Modules ranked by TUV Rheinland (GER)1 and Desert Knowledge Center (AUS)2 tests as one of the best performing module compared with other leading international brandsn CENTER FOR EXCELLENCE: world class in-house testing center

n Modules ranked by TUV Rheinland (GER)1 and Desert Knowledge Center (AUS)2 tests as one of the best performing module compared with other leading international brandsn CENTER FOR EXCELLENCE: world class in-house testing center

n A single campus to ensure optimal yield and quality throughout the entire manufacturing processn Efficient management of our supply chain

n A single campus to ensure optimal yield and quality throughout the entire manufacturing processn Efficient management of our supply chain

n Cell efficiency: Achieved 18.8% for mono & 17.5% for multicrystalline end of 20093

n Goal: reach up to 19.5% mono and 18.0% multi by end of 2010 3

n Cell efficiency: Achieved 18.8% for mono & 17.5% for multicrystalline end of 20093

n Goal: reach up to 19.5% mono and 18.0% multi by end of 2010 3

n Maintained healthy financials all year round, for a FY09 Gross Margin of 28.1% n As of June 30, 2010, the Company had $685.3 million in cash and cash equivalents and restricted cash.

n Maintained healthy financials all year round, for a FY09 Gross Margin of 28.1% n As of June 30, 2010, the Company had $685.3 million in cash and cash equivalents and restricted cash.

Our Facilities

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1. A Global Solar Player

2. World Class Manufacturing

3. Trina Solar Strategy

4. Market and Sales

Trina Solar Strategy

Portfolio strategy

Expand product line to serve more customer segments and markets worldwideLarge product line from 175Wp to 290WpNew products tailored for residential and utility systems

Reliability & technology

Internal reliability testing on module & materialsAccelerated Life Testing reliability tests – 25yr warranty Working closely with UL, ICIM, TUV and customersFull vertical integration to ensure top quality at each step

Customer focus organization

Local sales & technical team to support salesOn-line after sales service launchedDevelop global & diversified customer base to mitigate risk and reduce currency exposure

DELIVER THE BEST VALUE TO CUSTOMERS & INVESTORS

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Solutions for all applications

RESIDENTIAL

COMMERCIAL

INDUSTRIAL

UTILITY

RELIABLE PRODUCTS

n Positive tolerance for all products (0+3%)

n Ongoing research and testing to minimize Micro-cracks

n LID testing

n Experimenting with module color to provide customers with custom solutions

n Certificates for all major markets (TUV, UL, ICIM, VDE, JET and SGS)1

n Offer a 5-year manufacturing warranty, 10-year output warranty (90%) and 25-year output warranty (80%)

Products For Every Segment

Residential

Commercial

Utility

Product Portfolio

Mono-Series Multi-Series Design-Series

TSM-DC01 TSM-PC05 TSM-PC14 TSM-DC01 Black TSM-PC05 Black

ØWattage range: 175 – 240 Wp

ØModule Efficiency: up to 14.70%

Ø 48, 60, 72 high efficiency Mono cells

ØWattage range: 220 – 290 Wp

ØModule Efficiency: up to 14.95%

Ø 60, 72 high efficiency multi cells

ØWattage range: 175 – 235 Wp

ØModule Efficiency: up to 14.50%

Ø60 high efficiency multi cells or 72

high efficiency mono cells

TSM-DC05TSM-DC03

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New Product - TSM-DC80

Quad MAX– NEW square MONO crystalline cell withadvanced production process:

1. Two high temperature thermal processes

2. Additional printing and cleaning step

3. Uses special paste for cell surface

→ Conversion efficiency: up to 18.8%→ Average efficiency: 18.2%

TSM-DC80 – The QuadMAX module

§Module conversion efficiency of up to 15.6%

§Modules using QuadMAX technology have up to 8% more power

output

§ Aesthetic appearance of QuadMAX cell provides ideal design

solutions for residential rooftop applications

18.8% cell efficiency1

161_ up to 18.8% , test production line basis

Quality, guaranteed by rigorous in-house testing

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Mechanical Loading Test

UV Test

Power Determination

Test

CENTER FOR CENTER FOR EXCELLENCEEXCELLENCEn Over 30 in-house tests, allows internal testing in accordance

with IEC standards and those of internationally-trusted testing bodies

n Long-term Strategic Partnership with TUV Rheinland Group, Underwriters Laboratories Inc (UL) and China General Certification Centre (CGC).

n Material & Electrical testing to increase panel durability and prolong product lifetime

n Allows Trina Solar to confidently offer customers our customers product and manufacturing warranties

Sample Tests

Overview of Quality Tests

Environmental Reliability Testing:Trina Solar puts a selection of PV modules through extreme environmental testing to ensure reliability and performance in the world’s most unforgiving environments. This allows Trina Solar to confidently provide our customers with a 25 year output warranty.

Component Testing:Trina Solar carefully tests the performance of each module component both individually and together in order to maximize electrical output while minimizing the degradation of the module over its lifetime.

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Damp Heat Test

Damp Heat Test

Mechanical load Test

Mechanical load Test

Wet Leakage Test

Wet Leakage Test

UV Preconditioning

Test

UV Preconditioning

Test

Corrosive Atmosphere

Test

Corrosive Atmosphere

TestImpact TestingImpact Testing

Outdoor Exposure Test

Outdoor Exposure Test

Highly Accelerated Stress Test

Highly Accelerated Stress Test

Humidity Freeze TestHumidity

Freeze Test

Insulation Test (Dry & Wet)

Insulation Test (Dry & Wet)

Thermal Cycling Test

Thermal Cycling Test

Hot-spot Endurance Test

Hot-spot Endurance Test

Materials & components

testing

Materials & components

testing

Measurement of NOCT

Measurement of NOCT

Q. C. throughout

Manufacturing Process

Q. C. throughout

Manufacturing Process

Micro-crack Testing

Micro-crack Testing

Flash TestingFlash TestingElectrical

Component Testing

Electrical Component

Testing

Bypass Diode Test

Bypass Diode Test

The Best $/kWh Under The Sun

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Results of the Photon Test, September 2009 (in kWh/kWp)

Trina Solar panels are among the world’s top performers.Trina Solar panels are among the world’s top performers.

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Even in the harsh Australian desert, Trina Solar panels outperformed competitors.

Even in the harsh Australian desert, Trina Solar panels outperformed competitors.

Average Daily output, 2009 (Jan-Dec), in kWh/kWp

How much more electricity do you get by using Trina Solar modules?

How much more electricity do you get by using Trina Solar modules?

Trina vs.BP Mono +8.0%

SPWR +4.7%

BP Poly +4.5%

Kyocera -1.3%

Source: Data collected by the Desert Knowledge Australia, a public initiative supported by the Australia Energy Ministry

Desert Knowledge Australia test results

Alice Springs

The Best $/kWh Under The Sun

1. A Global Solar Player

2. World Class Manufacturing

3. Trina Solar Strategy

4. Market and Sales

Global Operations

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ZurichEurope HQ

Changzhou, JiangsuCorporate HQ & Factory

MunichSales Office

San Jose, CAN. America HQ

MadridSales & Marketing

Seoul, S. KoreaSales Office

Tokyo, JapanRegional HQ

BeijingSales Office

MilanSales Office

Corporate & Regional Headquarters

Regional Sales & Marketing Branches

Shanghai, ChinaCorporate

10 branch locations, 11,000+ employees10 branch locations, 11,000+ employees

Regionalized Decision Making

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n Benefits of regionalized decision making: • Closer proximity to customers and markets

• Improved, region-based Customer Service

• Increased reactivity to market demand

• Consistent Global Brand Management

• Closer-to-Market Product Feedback

n Recruited local teams of experienced experts

n New warehouses in Europe and North America for greater flexibility

Regional headquartersCHINA

SWITZERLAND

USA

JAPAN

OfficesKOREA

GERMANY

ITALY

SPAIN

Market Strategy

Customer Focus

Wholesalers and

Distributors

PV System Integrators /

Large installers

Brand Development PV System Owners and Financiers

Solid position in: Germany, Italy, Spain and Belgium

Strong development in: France, Czech Rep., Australia, US

Growing in: Korea, China, India, Thailand

Ø Geographical Distribution: 22 Countries

Ø Large diversified customer base

Ø Active medium-large size customers

Ø Rapid adaptation to market requirements

Ø Well developed channel strategy

Ø Local focus to provide excellent service and effective brand management

Manage Brand RecognitionIncreased Influence Over End Customer

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Geographic Diversification

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EUROPE USA & Others

Italy18%

Belgium14%

Spain 32%

2008 2008 201 MW

ROW10-5%

2009 2009 399 MW

1_Estimate

Italy19-21%

Spain 13-15%

2010201011

900-930 MW

Germany24%

Spain32%

Italy18%

Belgium14%

ROE3%

China4%

ROW5%

Germany33%

Spain12%

Italy20%

Belgium21%

France7%

USA2%

China3%

ROW2%

Czech Rep.4-6%

Germany29-31%

Spain10-12%

Italy19-21%Belgium

7-9%

France4-6%

USA13-15%

China3-5%

ROW2-3%

Serving customers in 22 countries…

Global Market Overview

GERMANY FiT decreases encourages

geographic diversification of customer base

ITALY Strong growth in ’09

CZECH REP. Outstanding ’09 growth to

continue into 2010

USA Market picking up in 2010, major growth of

utility segment

CANADA Ontario FiT to support steady growth

CHINA National Feed-in-Tariff expected to spur

PV growth

INDIA Strong emerging market

2009 PV Market estimate: 7.3 GW

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Source: internal estimates 26

Regional Market Outlook: Europe

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Key European Markets in 2010EUROPEAN MARKET OUTLOOKn Germany to remain biggest World market despite FIT digression.n CAP expected to be reached in Italy in 2010.n French FIT changes to support growth of agricultural sector & medium size PV plants.n Spain to remain a small market BUT very strong customers acting internationally.n Belgium to decrease its size BUT very strong customers acting internationally

TRINA ACTIONSn New European HQ in Zurich.n Expanded Sales Team in Germany.n New sales office in Milano & Madridn Growing portfolio of Czech clients.n Partnership with French top distributors.nWorld’s Largest Commercial Rooftop installation in Belgium (40MW) with Invictus.

Trina Sales Presence

205 kW in Galargues, (South Eastern France)

26 MW in Murcia, Spain 20 kW in a Rome school, Italy

3,3 MW PV plant in Bavaria, Germany

100 kW in Arcadia, Greece

40 MW rooftop in Belgium

Sample projects throughout Europe

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Regional Market Outlook: USA

Key 16 State Markets in 2010US MARKET PROSPECTSn Strong growth in 2010

driven by state RPS requirements

nARRA funding to boost renewable energy sector

n Project financing slowly improving

n Rapid growth of utility-scale projects

TRINA ACTIONSn New Regional Headquarters

established in San Jose, CA

nCompleted 2 MW ground-

mounted system at Colorado

State University

n Partnerships with key national

distributors, developers, and

utilities

n Sales and customer services

reps in each region

Trina Sales & Marketing Presence

2 MW ground-mountColorado State University

2.4 MW rooftop Atlantic City Convention Center

Large-scale ground-mount

Large-scale rooftop

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Regional Market Outlook: Asia-Pacific

Key APAC Markets in 2010APAC MARKET PROSPECTSn Australian market begins period of rapid growth under strong state Feed-in Tariffs

n Chinese market expected to take off in 2010

n India’s “National Solar Mission” spurs market growth

n New FiT encourages smooth growth of Japanese residential market

TRINA ACTIONSn New Sales Offices in Japan

& Korea

n Partnership with RFI, one of Australia’s largest solar distributor

nGrowing project pipeline in China

n Sales and customer service reps in each region

31.5 kW ground-mountAlice Springs, Australia

700 kW ground-mountTibet, China

1.8 MW ground-mountNaju City, Korea

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Project Installations (1/2)

Spain – 26MW10th largest installations in the world 1

1. Source: pvresources.com, as of April 3, 20092. As of April 3, 2009

USA – 2.4MWAmerica’s largest single rooftop installation 2

Netherlands – 83kW2007 largest PV system in the Netherlands

Italy – 4.7MWLargest PV rooftop system in Italy 2

Germany – 3.3MWSaves 2,200 tons of CO2 a year

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Project Installations (2/2)

Australia – 31.5kW

Greece – 100kWKorea – 1.8MW

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Antwerp, Belgium – 40MW

Marketing Activities: New Sponsor of Renault F1 Team

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n Global Ambassador of Solar PV: help elevate the status and accelerate the global adoption of solar PV

n Bring PV to the wider audience of global sports enthusiasts

n Trina Solar technologies will be integrated into the operations and ongoing upgrades of the Renault team’s Enstone facilities

n Contribute to the ‘greening’ of the Renault F1 team and the F1 sporting community

n F1 Race Tracks in all major markets

Increased Brand Recognition& Global Partnerships

Marketing Activities

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Sponsorship of Lisa Airplane:Developed 100% eco-friendly airplane, called the Hy-Bird. The plane will be flown around the globe, in stages.

Sponsored the Belgian European Pavilion at the Shanghai World Expo 2010

Customer Events

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Organized customer events at the most important trade shows in Europe, Asia, and North America

Organized customer events at the most important trade shows in Europe, Asia, and North America

Locations of Customer Events:

Valencia, Spain

Munich, Germany

Los Angeles, USA

Tokyo, Japan

Shanghai, China

Changzhou, China

and more to come…

www.trinasolar.com

CHINA

JAPAN

KOREA

U.S.A.

SWITZERLAND

GERMANY

ITALY

SPAIN